Estimated Speed And External Accelerative Forces; Storage Of Parameters - Danfoss Vacon OPTEA Operating Manual

VACON® NXP Advanced Safety Options
Operating Guide
Gear Ratio Multiplier
Estimated speed rpm =
Gear Ratio Divider
See the parameters related to estimated speed in

3.6.10 Estimated Speed and External Accelerative Forces

If estimated speed is used in systems where the safe state is not the STO function alone, analyze the consequences on system level.
As estimated speed is not calculated when the AC drive is not in RUN state, the safety system depends on the external speed sensor.
During a standstill, only a single channel speed estimation is available. When external forces can cause acceleration and torque to
the motor and make the motor rotate, a mechanical brake must keep the motor shaft stationary.

3.7 Storage of Parameters

It is possible to store the parameters of the Advanced safety option board as a backup in other locations. The different backup loca-
tions are handled in the control board of the AC drive. Use the control panel of the AC drive to control the parameter backup.
Table 15: Parameter Storing Locations
Location Description
The currently used parameter file is always saved on
OPTBL
the option board.
OPTBM
OPTBN
Control The currently used parameter file is uploaded to the
board of the control board during start-up and after each change in
AC drive the parameter file. The parameter file is not stored per-
manently. To store the parameter file permanently in
the control board as a backup, use the control panel.
PC The parameter files should be stored on the PC and in
the version control or another system that is used to
handle the configurations used on the field.
For more information on the PC tool VACON
The handling of the parameter file backup on the control board is not a safety critical feature, and it is the responsibility of the
operator to use the correct parameters for the Advanced safety option board. A verified parameter file that is read from a backup to
the option board will be accepted and taken into use. If the parameter file does not correspond to the actual configuration, for
example, if it has a different encoder parameterized than what is supported by the used encoder interface board, the option board
does not allow the STO function to be deactivated.
Advanced
safety option
board
Illustration 17: The Backup Locations of the Parameter File and their Control
Danfoss A/S © 2021.06
× external sensor speed rpm
8.1.3 Speed Measurement
Safe or the parameter file, see
®
Control Board
Location select
Save/Restore
Parameter file
Control board
back-up
Parameters.
Checks and restrictions
In the start-up of the option board, the option board
checks the parameter file to make sure that it is com-
patible. The option board always checks a new parame-
ter file.
The control board checks the CRC of the uploaded or
stored parameter file to make sure that it is correct, but
does not check the compatibility of the parameter val-
ues.
VACON Safe creates unverified parameter files and
®
stores verified parameter files "as is" without modifica-
tions to the safety critical and CRC protected area.
5.2 The Parameter File.
Control panel
PC tool
AQ319736045637en-000101 / DPD01798 | 43
Overview of the System
PC